Re: [OMC-Boats] Carb and fuel gauge

From: Andy Perakes <aperakes@...>
Date: Mon, 28 Sep 2009 22:05:13 -0400

Actually you DO want to store you boat with the tank full of gas at the end of the season -- either completely full or fully dry. Anything in-between and your fuel will be vulnerable to moisture-induced phase separation. Because your fuel system is "open" (vented to the atmosphere), it "breathes" as temperature changes. As the warm, moist air enters and exists, it leaves behind the moisture -- water. Ever since MTBE was phased out several years ago, almost all gasoline has been blended with Ethanol (i.e., E10) as the oxygenate additive. Not only is ethanol a water attractant, but the resulting mixture is very corrosive and will destroy both the tank and sender (beware some plastics and fiberglass are also vulnerable to ethanol) -- this is why ethanol can't be pumped through existing pipelines. Although any fuel has a limited shelf life, the shelf life of E10 is much shorter, about 3 months. If you don't run the tank dry, always use a good fuel stabilizer (Marine Formula StaBil or equivalent, and top the tank off to minimize the amount of air influx.

'67 Reveler 155

  ----- Original Message -----
  From: BLDFW
  To: bchowk@... ; Evinrude & Johnson Boats of the 1960's and 70's
  Sent: Sunday, September 20, 2009 1:20 PM
  Subject: Re: [OMC-Boats] Carb and fuel gauge

        Hmmm.... Mine has the original pink wire that runs to the gauge. It doesn't appear to be a heavy gauge. After I pulled the tank and cleaned it out, I checked the fuel sending unit which appeared to be working fine. I did have to replace the barrel float. I'd pull the sending unit, hook it up to power and the move the arm up and down to check it's functionality and what it reads on the gauge. If it's working, and the full up and down sweep registers accordingly on the gauge, it's possible the arm just needs to be bent a bit to make more accurate when sitting in the tank.

        In any case, filling up each time is not a bad idea though probably not good at the end of the season when you find you have a near full tank that likely will sit over the winter. I'm keeping mine low at the moment and will siphon any residual out when I put the boat up for good.....Of course that assumes I ever get mine running properly this season! sigh......

        I did spend the morning attaching and adjusting my new bimini top....and enjoying it's shade while sitting in the driveway behind the wheel.....fantasizing about zooming across the lake!

        Minor update....after all my charging problems, I finally figured out that my original voltage regulator so no need for a new one....the problem was that my brand new alternator was not charging. Apparently it was never charging from the get go. Can't prove it. I sent it back a week ago Friday and now waiting to see if they will exchange it or tell me I broke it and will have to pay to get it back and in working order.

        Always something.

        Dallas, TX
        1970 Evinrude Explorer - 155 Buick V6 - OMC Sterndrive


        --- On Sun, 9/20/09, BC Howk <bchowk@...> wrote:

          From: BC Howk <bchowk@...>
          Subject: Re: [OMC-Boats] Carb and fuel gauge
          To: omc-boats@...
          Date: Sunday, September 20, 2009, 11:17 AM

          I have the exact same issue, in my case I believe the wire to the sender is too small (it is CLEARLY not factory wiring), I bought one of those universal senders and been looking around on the internet for fuel gauge calibration techniques (I REALLY want to keep my factory gauge)but have not yet really focused in on fixing the problem and installing the new sender.....

          I just tend to fill it up anytime I'm heading out, wether it needs it or not

          I'll be interested in what any of ya'll have done as well.


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Received on Monday, 28 September 2009

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